參數(shù)資料
型號： 935263011112
廠商： NXP SEMICONDUCTORS
元件分類： 通信及網(wǎng)絡(luò)
英文描述： SPECIALTY TELECOM CIRCUIT, PDSO16
封裝： PLASTIC, SOT-162, SO-16
文件頁數(shù)： 2/33頁
文件大?。?/td> 574K
代理商： 935263011112
Philips Semiconductors
PCD3316
CIDCW receiver
Product specication
11 March 1999
10 of 30
9397 750 04824
Philips Electronics N.V. 1999. All rights reserved.
Unrestr
icted
7.11 32 kHz oscillator
The 32.768 kHz oscillator is enabled permanently and is used to generate either a
1 second or 1 minute interrupt. The 32.768 kHz clock is also used for the ‘Ring or
polarity change detector’, the ‘Low battery detection’ and the ‘Level detect’ function.
An external 32.768 kHz signal may be applied to pin LXIN while leaving pin LXOUT
not connected.
The 32 kHz oscillator requires an external 32.768 kHz quartz crystal and an external
feedback resistor (4.7 M
) between the LXIN and LXOUT pins (see Figure 8).
7.12 Serial interface
The serial interface of the PCD3316 is the I2C-bus. A detailed description of the
I2C-bus specication, including applications, is given in the brochure:
The I2C-bus
and how to use it, order no. 9398 393 40011 or I2C Peripherals Data Handbook IC12.
7.12.1
Characteristics of the I2C-bus
For the I2C-bus conguration see Figure 9. A device generating a message is a
‘transmitter’, a device receiving a message is the ‘receiver’. The device that controls
the message is the ‘master’ and the devices which are controlled by the master are
called the ‘slaves’. The PCD3316 operates in the slave transmitter/receiver mode
only.
The I2C-bus is for bidirectional, two-line communication between different ICs or
modules. The two lines are a serial data line (SDA) and a serial clock line (SCL). Both
lines must be connected to a positive supply via a pull-up resistor. Data transfer may
be initiated only when the bus is not busy.
Fig 8.
Connections of the 32 kHz oscillator.
handbook, halfpage
MGK724
32.768 kHz
OSCILLATOR
LXIN
LXOUT
PCD3316
67
4.7 M
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